MSDN Download Vista

In the article about making your own computer the How-To Geek said he got a MSDN copy of Windows Vista.
I wanted to degrade my Windows 7 RC and make another partition for Vista because my computer came with Windows Vista Home Home Premium and Windows 7 is cool and all... but the RC does not last forever.

I just need a vista iso or something i can put on a dvd because my computer came with vista and i overwritten vista to windows 7 so i want to be prepared when the time comes when windows 7 RC won't work anymore.

If your system came with Vista, you have most likely a recovery partition (D:) from where you can reinstall Vista. Check in "Computer" whether such a D: partition exists. If yes, double click on it and see what's inside. Depending on the make of your PC, the reinstallation procedure will be slightly different. If you tell us the make of your PC, we can help you find the correct procedure.
PS: from D:, you can also burn an installation DVD. But for that, you first have to reinstall Vista.

Hmm, you must have done a good job erasing everything. If there is nothing in D:, then you are stuck and have to purchase an OS in June next year or you can call Gateway and ask them to send you a recovery disk. They used to do that for a $20 S&H fee. Tell them that you accidently erased D: whilst trying to install W7. I think their Tel. # is 1-408-273 0808. Have your model number and serial number handy.